铑粉粒度对其溶解的影响  

Effect of Rhodium Powder Particle Size on Its Dissolution

作　　者：吴晓峰[1] 董海刚[1] 陈家林[1] 童伟锋[1] 范兴祥[1] 赵家春[1] 吴跃东[1] 李博捷[1] 

机构地区：[1]昆明贵金属研究所,贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2013年第1期38-41,共4页Precious Metals

基　　金：国家重点基础研究发展计划(973计划)(2010CB735501)资助

摘　　要：铑是最难溶解的铂族金属之一,但在铑的提取和应用中铑的溶解又是必不可少的关键环节,研究发现铑粉粒度对铑的溶解有着直接的影响。考察了铑粉粒度和铑粉表面状态对铑溶解的影响。实验结果表明,铑的溶解率与其粒度呈现负相关的关系,粒度≥100μm的铑粉基本不溶解,粒度≤10μm级的铑粉有着很高溶解率。对王水溶解后的铑粉表面通过微区能谱分析表明,铑粉表面并没有氧化物形成,铑粉溶解过程中的微溶现象,是由于溶解时铑粉中的小颗粒铑粉首先溶解,当小颗粒铑粉溶解完,大颗粒铑粉不溶解所致。Rhodium is one of the most insoluble platinum group metals, but rhodium dissolution is an indispensable key link in the extraction and application of rhodium. Research shows that rhodium particle size has a direct effect on rhodium dissolution. The effect of rhodium powder particle size and surface state on the dissolution of rhodium was studied. The experimental results show that, the dissolution rate of rhodium powders is negatively correlated with the particle size, rhodium powders of 100 pm are substantially insoluble, the rhodium powders of 10 μm have very high dissolution rate. EDX analysis results show that there is no oxidation formation on the surface of the dissolved rhodium powders by aqua regia, the slightly soluble phenomenon occurred at rhodium powder dissolved, due to small particles rhodium is firstly dissolved in rhodium powder, when the small particles rhodium powder has dissolved, the remaining large particles of rhodium powder insoluble.

关 键 词：冶金技术 铑粉 赋存状态 溶解 

分 类 号：TF837[冶金工程—有色金属冶金]